WIP for display item list backed by ListContainer

Source/core/paint/SVGMaskPainter.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/SVGMaskPainter.h"
 
 #include "core/layout/svg/LayoutSVGResourceMasker.h"
 #include "core/paint/CompositingRecorder.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
@@ skipping 10 matching lines @@
     ASSERT(context);
     ASSERT(m_mask.style());
     ASSERT_WITH_SECURITY_IMPLICATION(!m_mask.needsLayout());
 
     m_mask.clearInvalidationMask();
 
     FloatRect paintInvalidationRect = object.paintInvalidationRectInLocalCoordinates();
     if (paintInvalidationRect.isEmpty() || !m_mask.element()->hasChildren())
         return false;
 
-    if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
-        ASSERT(context->displayItemList());
-        if (context->displayItemList()->displayItemConstructionIsDisabled())
-            return true;
-        context->displayItemList()->add(BeginCompositingDisplayItem::create(object, SkXfermode::kSrcOver_Mode, 1, &paintInvalidationRect));
-    } else {
-        BeginCompositingDisplayItem beginCompositingContent(object, SkXfermode::kSrcOver_Mode, 1, &paintInvalidationRect);
-        beginCompositingContent.replay(*context);
-    }
+    //if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
+    //    ASSERT(context->displayItemList());
+    //    if (context->displayItemList()->displayItemConstructionIsDisabled())
+    //        return true;
+    //    context->displayItemList()->add(BeginCompositingDisplayItem::create(object, SkXfermode::kSrcOver_Mode, 1, &paintInvalidationRect));
+    //} else {
+    //    BeginCompositingDisplayItem beginCompositingContent(object, SkXfermode::kSrcOver_Mode, 1, &paintInvalidationRect);
+    //    beginCompositingContent.replay(*context);
+    //}
 
     return true;
 }
 
 void SVGMaskPainter::finishEffect(const LayoutObject& object, GraphicsContext* context)
 {
     ASSERT(context);
     ASSERT(m_mask.style());
     ASSERT_WITH_SECURITY_IMPLICATION(!m_mask.needsLayout());
 
     FloatRect paintInvalidationRect = object.paintInvalidationRectInLocalCoordinates();
     {
         ColorFilter maskLayerFilter = m_mask.style()->svgStyle().maskType() == MT_LUMINANCE
             ? ColorFilterLuminanceToAlpha : ColorFilterNone;
         CompositingRecorder maskCompositing(*context, object, SkXfermode::kDstIn_Mode, 1, &paintInvalidationRect, maskLayerFilter);
         drawMaskForLayoutObject(context, object, object.objectBoundingBox(), paintInvalidationRect);
     }
 
-    if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
-        ASSERT(context->displayItemList());
-        if (!context->displayItemList()->displayItemConstructionIsDisabled()) {
-            if (context->displayItemList()->lastDisplayItemIsNoopBegin())
-                context->displayItemList()->removeLastDisplayItem();
-            else
-                context->displayItemList()->add(EndCompositingDisplayItem::create(object));
-        }
-    } else {
-        EndCompositingDisplayItem endCompositingContent(object);
-        endCompositingContent.replay(*context);
-    }
+    //if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
+    //    ASSERT(context->displayItemList());
+    //    if (!context->displayItemList()->displayItemConstructionIsDisabled()) {
+    //        if (context->displayItemList()->lastDisplayItemIsNoopBegin())
+    //            context->displayItemList()->removeLastDisplayItem();
+    //        else
+    //            context->displayItemList()->add(EndCompositingDisplayItem::create(object));
+    //    }
+    //} else {
+    //    EndCompositingDisplayItem endCompositingContent(object);
+    //    endCompositingContent.replay(*context);
+    //}
 }
 
 void SVGMaskPainter::drawMaskForLayoutObject(GraphicsContext* context, const LayoutObject& layoutObject, const FloatRect& targetBoundingBox, const FloatRect& targetPaintInvalidationRect)
 {
     ASSERT(context);
 
     AffineTransform contentTransformation;
     RefPtr<const SkPicture> maskContentPicture = m_mask.createContentPicture(contentTransformation, targetBoundingBox, context);
 
     LayoutObjectDrawingRecorder drawingRecorder(*context, layoutObject, DisplayItem::SVGMask, targetPaintInvalidationRect);
     if (drawingRecorder.canUseCachedDrawing())
         return;
 
     context->save();
     context->concatCTM(contentTransformation);
     context->drawPicture(maskContentPicture.get());
     context->restore();
 }
 
 }